Video cutter and audio cutter apps?

Is there any apps that will allow me to take a long video then cut out the part that I want to send VIA MMS or Email. It is impossible to take 50 20sec clips just to try and catch a moment at a kids game or at the park then find the right one to send off to people. Even the oldest Android phone has the power to cut video, so why is there no app or am I just missing it?